Paper-making machine



(No Model.) 3 Sheets--Sheet l,

H. F. CASE. PAPER MAKING MACHINE. No. 286.587. Patented Oct. 16, 1883.

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(No Model.) 3 Sheets-Sheet 2.

' H. F. CASE.

PAPER MAKING MACHINE.

No. 286.587. Patented Oct. 16, 1883..

WW wa w v g 27%". SW02 panying drawings, where UNITED STATES HENRY F. CASE, OF SOUTITMANCHESTER, CONNECTICUT.

PAPER-MAKI'NG MACHINE.

iPiCIFIGA'IION formingpart of Letters Patent No. 286,587, dated October 16, 1883.

,A pplication filed September 3. 1883. (No model.)

To all whom it may concern:

rBeitlznown that I, HENRY F. CASE, of South Manchester, in the county of Hartford and State of Connecticut, have invented certain new 'and useful Improvements in Paper- Making Machines, of which the following is a description, reference being had to the accom- Figure 1' is a s de view of my improved device. Fig. 2 is a top view of the same. Fig. 3 is a rear view of the making-rolls, showing parts in. section to show details of construction. Fig. 4 is a front view of the felt-rolls 1 and felt squeeze-rolls, with parts in section.

Fig. 5 is a view in section through the levers on line at a: of Fig. 1. Fig. 6 is a detail View, on enlarged scale, of a part of the making-roll, felt, and auxiliary rolls, showing the method of adding the pulp to the material on the roll.

My invention relates to the art of papermaking, more particularly to what are called wetinachines; and it consists in improved methods of delivering the stuff or pulp to the der side of the top pressrolls,

screen; in the arrangement of the felt-stretcher 5 in the lateral arrangement of the making-rolls; in the use of auxiliary press-rolls for rewetting the outer layers of paper on the making-roll, and then removingthe surplus water before theboard is passed between the making-rolls, in the adjustable bearings of the felt squeeze-rolls, and in several other details more particularlvhereinafter described.

In the accompanying drawings, the letter a denotes a frame; Z), the front standards, and c the rear ones, secured at the top by ties and braces d, and having suitable feet for securing the whole to the floor.

Fast to each of the standards I) is a suitable bearing, b, for the bottom press-roll, J6, and also upright stand f, in which a vertically-adjust-able swinging lever, g, is pivoted. To this lever is secured the vertical cross-arm g, near the lower end of which (in a block, h,that is vertically adj ustable in the arm) is pivoted a lever, h, to the forward end of which is pivoted a rocking bearing, j, for the auxiliary press-rolls is, arranged to bear upon the un-' As usually made, the axis of the top press-roll is vertically over that of the bottom press-roll; but I place the top roll, 2, some distance to one side of the vertical, so that it overhangs the bottom press-roll, e, for purposes that will bemhere inafter explained. The weight of the swinging lever and connected parts upon the journals of the top press-roll is balanced by the coun 1) has a bearing for the felt-roll r, and sleeverj one for the top felt squeeze-roll, a", set in suitable bcarin gs on the standard. Any pressure put upon the felt-roll, as by means of the felt s, is transferred to and exerted upon the wet felt as it passes between the squeeze-rolls. The cou cher-roll t is journaled in the frame 1, pivoted to the standards 0, and raised orlowered by means of the winch a and cords n.

Below the coucher-roller is the semi-cyhu drical vat o, in which is rotarily suspended the usual form of making-cylinder, '0.

Back of the making-vat 'v, and connected by the stuff-pipe if with it, is the stuff-box bearing the tilting screen w, which is shaken 1n the usual manner by the cam mechanism to.

The felt stretcher-roll r, and the stretchlng mechanism of screw-rods, traveling bearings, and bevel-gears,are arranged in a space below the makingvat and stuff-box in a position that keeps the front of the machine free for .the near approach of a truck, on which the workman deposits the moist sheets of board from the press or making-roll for ready transport to the drying; stack. The old form of wet machine has the stretching apparatus extending from the front of the machine.

The felt 8 passes in the usual course in an endless belt over the making-cylinder, from which it gathers a layer of pulp or stuff around the coucher if, over the felt-roll 1-, between the top press roll and the auxiliary press-rolls and the lower press-roll, down to and around the roller 4, the stretcher-roller 1', the roller 7*, up past the feltwasher s, between the squeeze 2 rolls, to the making cylinder and coucher-roll, constantly taking up a layer of pulp and depositing it upon the making-r0111.

The sleeve-bearings of the felt-roll and the IOO top squeeze roll enable me to adjust the squeezing-pressure upon the felt as it passes between the squeeze-rolls by means of the felt-stretcher,

as an increased tension upon the felt makes 5 an increased pressure upon the squeeze-rolls.

On the old machines it has been impossible to form a paper board beyond a certain thickness, less than was desired. The thickness of the board depends upon the number of layers 1 formed upon the making-roll, calling the length deposited by a single revolution of the roll a layer. If layers beyond a certain number (depending on the quality of the pulp and thickness of the layer) were allowed to make on the I roll, theboard wrinkled and blistered badly.

This defect is caused by the dryness of the outside of the board as it meets the felt to receive the next layer after passing between the press-rolls. This surface is wet, but not enough so to allow it to make a good union between =-the layers, which may be easily separated in the finished board.

By arranging the press-rolls so that the up- I per projects laterally over the lower, space is gained for the auxiliary rolls that serve the the new layers of pulp, which are partially I formed and dried by the lower auxiliary roll, and then pressed into a homogeneous mass be- 1. In a paper-making machine, the method of remoistening the surface of binders board or the like after it has passed between the press-rolls and previous to, the reception of a new layer of pulp, whereby a homogeneous board is formed, all substantially as described.

2. In a paper-making machine, in combina; tion, a top press-roll overhanging the lower press roll laterally, all substantially as described, and for the purpose set forth.

3. In combination, a press-roll, 6, top pressroll, t', and auxiliary rolls 70, all substantially as described.

4. In combination, bottom press-roll, 6, top press-rol1, t, and adj ustablelever 9, having arm 9, bearing lever h with weight and counterpoise, whereby the pressure between the rolls is adjusted, all substantially as described.

5. In combination, top roll, 2', lever g, having arm 9, lever h, rocking bearing j, and auxiliary rolls k, all substantialy as described.

6. In combination, frame a, felt s, felt-roll, squeezerolls r, and sleeve-bearings p q. all substantially as described.

7". In combination, frame a, eoucher-frame t,'wineh a, and cords a, all substantially as described.

HENRY F. CASE. \Vitnesse's:

(Jr-ms. L. BURDETT, IV. H. MARsI-I. 

